So my readers probably noticed the fact that this blog just stopped mid-February, without any explanation. Life in our local part of the universe was substantially more chaotic than usual. World wide protests, devastating natural

Astrophysics and Gravitation: Lensing of Black Holes Can Determine the Metric Around Them? Bin-Nun, A. (2010). Gravitational lensing of stars orbiting Sgr A* as a probe of the black hole metric in the Galactic center